Car roof



latented Mar. 29, 1932 UNITED STATES P-AVTENT;"oF-FICE- CHARLES DAvIn :BoNsALL orf rrr'rsBUnGm 'PENNSYLVANIA nssrofNoitl rro. r. E. y n

j. MURPHY COMPANY, or NEW KENSINGTON.rENNsYLvANIA,` A couroRA'rioNy or PENNSYLVANIA v i `CAR noon j Application mea rebmafyazisalseriaiNo..51s,7o4.

This invention relates to car roofs of the all-steel, riveted-up typewherein the roong sheets extend from side plate to side plate and are rigidly secured thereto-and to each other tozform a rigid loadsustaining structure. The principalv object of the present invention is to provide astrong and durable Y waterproof roof of simple construction which can be cheaply manufactured and easily as- 10 sembled. Other objects are to provide the roof with insulating airsp'a-cesv and to 'provide an insulating lining for the underside of the roof.' The invention consists princi-y pally inincreasing the-strength andrigidity 15 of the roof by means of upperand lower sheets that are rigidly'secured/together and to'the'side plates; it'alsovcons-ists in shaping and arranging the lowerv sheets -to provide air insulating spaces therein it also consists 2b in securing an insulating` lining to the underside of theroof; and it alsoconsist'sin the construction and arrangements of partshereinafter described and claimed. In the accompanying drawings, wherein y 2'5 like symbols refer to like vparts wherever they occur, A j v Fig. 1 is a plan view vof-a portion ofthe car roof embodying my invention;v Fig. 2 isan enlarged cross-section through one-half of the roof on the line 2-2 in Fig; 1, y 1 f Fig. 3 `is a vertical `longitudinal vcrosssection through the roof on the line 3^-3 in Fig. 1, j

Fig. i is a vertical cross-sectionsimilar to Fig. 8, showing one Vof the seamson an enlarged scale; and v j lo Fig. 5 is av vertical transverse cross-section through the eaves portion of the car, the section being taken-through one of the seams on the line 5-5 inFig. 1. f

According to the present invention,I the metal roof comprises upper and lower roof sheets 1 and 2, respectively', which lare pitched or arched from side plate 3 to sidewplateV 3 and have their ends turnedrdown and rigidly secured together and to the outer faces of the upstanding inner flanges of said side plates 'flat sheets that are overlapped along their vertical transverse Vby rivets 5. The upper roof sheets 1 comprisev adjacent side marginal portions andrigidly secured together byrows of rivets 6.. The

lower roof sheets 2 have their adjacent side marginal portions'offset upwardly,` as 'at 7 Vbeneath the overlapped side marginal por tions of the upper'sheetslf. The upwardly offset side'marginalportions '7` of adjacent lower roof sheets 2are overlapped and'rigidf ly ysecured together and to the overlapped side marginal portions 7 ofadjacent upper roof sheetsl V1 by the lrows of securing rivets 6.

By this arrangement', the lower roof sheets 2 "are connectedl alonggtheiradjacent side mar.

gins by invertedchannel-shaped upstanding stiffening ribs or seams'S'f, which serve to space the main'body portions of the lower sheets from the upper roof sheets 7 thereby forming a series of air insulating spaces!)` thatextend o from side toside ofthe car between saidiupper and lower roofl sheets and are spaced apart by saidhollow Vseams that connect together Vthe lower roof sheets.,` The air spaces 9ybetween the upper andlower series yofl roof Vsheets: are closed at the ends of the eavesof the` car bv theV downt'urned Veaves end portions-'of the upper rooffsheets. The 'upper roofsheets 1v are'. preferably madeofgah vanized metal. while thelower ,roof sheets 2 are, for sake of economy,preferably made of "80 sheets of black' iron;

VLocated within the hollow seams or ribsS,

rigidity thereof. Said stiffeners also serve as a means for attaching Yan insulatinglinying 11 to the underside of the roof. The inbottoms ofthe filler strips l10 by meansof nails ,12.` The filler strips 10 are preferably Vdeta'ch'ablv `secured within'the hollow ribs or'seams 8 of thelower roof by means of carriage bolts13 that are suspended from straps or clips 14 located inside offsaid ribs or seams andv securedxto the top walls thereof by the securingrivets 6 therefor. These bolt holder clips 14 of the seams 8 are located adjacent to the ridge and vthe eaves with their ends v'which connect the lower roof sheets 2,together and tothe upper roof sheets 1, are

sulating lining 11 is preferably secured to the Y of the. car at the ridge and are supported on the top flanges of Z-bar running board saddles 18, Whose base flanges rest on the j overlapped portions of the upper root sheets and are rigidly secured thereto by the rivets 6 that secure said portions together.

By the arrangement described, a considerable amount of metal is massed in the upper portion oi' the roof where it operates to increase the load carrying capacity of the roof. The roof is further stitlened and strengthened by the hollow box girders formed between the seams that connect together the lower series of roof sheets; and said box girders also form air insulating spaces between the upper and lower roof sheets. The hollow seams also serve to accommodate the nailing strips for the. wooden lining, which operates to further insulatetlie roofgand these nailing strips also serve to further increase the strength and rigidity of the roof.

Obviously, my invention admits of considerable modification in the design of hollow seams that connect the lower roof sheets, and I do not wish to be limited to the speciiic design illustrated. Y

What I claim is:

1. A car roofconsisting of upperand lower roofl sheets connected along their adjacent side margins'by rigidseams, and constituting a self-supporting structure, each seam com- `:prising a single row of rivets extending through two upper sheets and two lower sheet 2. -A car roof comprising upper and lower roof sheets that extend from eaves to eaves of the car and constitute a self-supporting structure, said upper sheets being connected together and to said lower sheets along their adjacent side margins by rigid seams the lower sheets havingupturned side margins and each `seam comprising a single row of rivets.

3. A car roof comprising upper and lower roof sheets that extend from eaves to eaves of the car and constitute a self-supporting structure, said upper sheets having their adjacent margins overlapped, and said lower sheets being connected along their adjacent margins byupstanding seams, said seams being located beneath and rigidly secured to the overlapped margins ot' said upper sheets.

4. A car roof comprising upper and lower roof sheets that extend from eaves to eaves of the car and contitute a self-supporting structure, said upper sheets having their adjacent margins overlapped, and said lower sheets being connected along their adjacent margins by upstanding seams, said seams being located beneath and rigidly secured to the overlapped margins of said upper sheets, the eaves end portions of said upper sheets being bentl downwardly over the eaves ends of said lower sheets.

5. A car'roof comprising series of upper and lower roof sheets thatextend from eaves to eaves of the car and are rigidly connected together along ,their adjacent side margins and constitute a self-supporting structure, the sheets of one of said series having ribs formed therein that bear against the sheets of the other series and serve to space apart portions of the sheets of the two series.

6. A car root` comprising upper and lower roer" sheets that extend from side plate to side plate with their ends turned down and riveted-together and to said side plates and constitute a self-supporting structure, said upper Asheets being rigidly connected along their adjacent margins, and said lower sheets having upwardly offset side marginal flanges secured to the undersides of said upper sheets.

7. A car roof comprising upper and lower roof sheets that extend from side plate to side plate with their ends turned down and riveted together and to said side plates and constitute a self-supporting structure, said upper sheets being made of galvanized metal and rigidly connected along their adjacent margins by seams, and said lower sheets being made ot black iron and having upwardly offset side marginal flanges secured to the undersides of ,said upper sheets along their Yconnecting seams.

8. A car roof comprising upper and lower sheets that lextend from side plate to side plate and have their ends turned down and rigidly secured together and to said side plates, said upper sheets having their adjacent margins overlapped, said lower sheets having their adjacent margins overlapped and offset upwardly beneath the overlapped margins of the upper sheets, and means for rigidly securing together the overlapped margins of the upper and lower sheets. Y

9. A car roof comprising upper and lower sheets that extend from side plate to side plate and have 'their ends turned down and rigidly secured together and to said side plates, said upper sheets having their adjacent margins overlapped, said lower sheets having their adjacent margins overlapped and offset upwardly beneath the overlapped margins of the upper sheets, means for rigidly securing together the overlapped margins of the upper and lower sheets, the upwardly offset overlappedside marginal portions of the lower sheets forming downwardly opening ribs, iiller strips in said ribs, and

Vtogether at their side margins to dead air insulating spaces separated by downv an insulating lining located beneath said roof and secured to said ller strips.

10. A car roof comprising upper'and lower sheets that extend from side plate to side plate with their ends turned down and riveted together and tofsaid side plates, said up per sheets having their overlapped directly below the overlapped margins of the upper sheets and secured thereto byy rivets extending through Vthe lapped margins` of two upperV sheets and two lower sheets, the overlapped upwardly offset margins of said lower sheets cooperating to form downwardly opening channels, wooden filler strips in said channels, and an insulating lining located beneath said roof and se p cured to said filler strips.

11. A car roof comprising upper and low-V er roof sheets adapted, arranged and secured" together at their side margins to form hollow dead air insulating spaces separated by downer roof sheets adapted,-arranged and secured form hollow wardly opening channels in the underside of said roof, iillerstrips in saidv channels, and

an insulating lining located beneath said roof and secured to said ller strips.

13. A car roof comprlsing upper and lower Vroof sheets that extend from eaves to eaves of the car at different levels with the mar- Y gins of adjacent upper sheets overlapping each other andwiththe margins of adjacent lower sheets oilset upwardly Vand overlaps ping each other below vthe overlaps of the upper sheets respectively,

extend through both per and the lower sheets.

Signed at New Kensington, Pennsylvania,

this 20th day of February, 1931. Y

CHARLES DAVID BONSALL.

adjacent margins overlapped, and said lower sheets having their Y adjacent side margins upwardly offset and y the upper andlower Y Y sheets being secured together by 'rivets that the overlaps of the up- 

